The year was 1977 and New York City burned. As the metropolis hurtled into bankruptcy, it’s nightlife hit unprecedented heights. In midtown, the exclusive Studio 54 was a cocaine-fueled celebrity clubhouse. Downtown, at the spartan CBGB’s, punk rockers set out to destroy everything Pop. Meanwhile, in the basement of the prestigious Ansonia building on the conservative Upper West Side, Plato’s Retreat opened its doors to ordinary couples who came to dance, to swim, and… to swap.